JPH03157076A - Liquid crystal television receiver and its manufacture - Google Patents

Abstract

PURPOSE:To attain a compact set by arranging an operation section including a switch on a front face of a circumferential part of a liquid crystal panel so as to make the liquid crystal display front outer size to be almost the liquid crystal panel size. CONSTITUTION:A case of a liquid crystal television receiver 1 consists of 3 cases as a top case 2, a center case 3, and a bottom case 4 and a front plate 2b made of a transparent material is adhered to the top case 2. Operation switches 81, 82, 83, 84, 85, 86, 87 of key switch method are provided under the top case 2. The operation switches 81, 82, 83, 84, 85, 86, 87 are arranged on a circumferential part under the liquid crystal panel. The operation switches 81, 82, 83, 84, 85, 86, 87 provided under the front face of the liquid crystal television receiver are used frequently used and give effect on the performance. The operation switch 81 is used for changeover of the television receiver and a video tape recorder(VTR) monitor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a liquid crystal television, and more particularly to a liquid crystal television having a distinctive arrangement of its operating section and a method for manufacturing the same.

[Conventional technology]

Conventional LCD televisions, for example,
As shown in Figure 2, when viewed from the front, the operating section was placed in a location other than the liquid crystal panel. Therefore, the front external dimensions of an LCD TV require an area equal to or greater than the area of the LCD panel + the area of the operating section, since the operating section is located in a location other than the LCD panel when viewed from the front. was.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, the front external dimensions of the LCD TV need to be larger than the area of the operation panel in addition to the area of the LCD panel. This was not a problem, but as the size of LCD panels becomes larger than 5 inches.

This was an obstacle to making LCD TVs more compact.

The purpose of the present invention is to
The objective is to provide a compact LCD TV with the external size of an LCD TV.

Another object of the present invention is to provide a method for manufacturing a liquid crystal television that is easy to assemble.

[Means to solve the problem]

The above object is achieved by arranging the operation section on the front surface of the peripheral portion of the liquid crystal panel other than the image display section.

In addition, the above purpose is to hold the operation unit between the top case and the liquid crystal panel, and attach the center case on top of this.
This is achieved by fixing the top case and the center case, and further fixing the bottom case to which the circuit board is fixed inside.

[Effect]

By arranging the operation section within the size of the LCD panel, the external size of the front of the TV can be reduced to the minimum size necessary to accommodate the LCD panel. Since it can be placed in the gap between the panel shield case and the TV case, the depth of the TV will not increase.

Furthermore, since the structure is such that each case, liquid crystal panel, operation section, etc. are assembled in sequence, the ease of assembly is improved.

〔Example〕

An embodiment of the present invention will be described above with reference to FIGS. 1 to 6.

As shown in the external perspective view of FIG. 1, the housing of the liquid crystal television 1 includes a top case 2, a center case 3. bottom case 4
The top case 2 is formed by three case parts, and a front plate 2b made of a transparent material is joined to the top case 2. And the third
As shown by the shield in the figure, the screen display section 5a of the liquid crystal panel 5
It is now possible to see through.

At the bottom of the top case 2, key switch type operation switch sections 81, 82, 83, 84, 85, 86, and 87 are provided. These operation switch parts 81, 82,
83, 84, 85°, 86.87 are arranged above the peripheral portion below the liquid crystal panel, which will be described later. The operation switch sections 81, 82, which are provided at the lower front of these LCD televisions,
83, 84, 85°, 86.87 are all frequently used and affect operability. The operation switch section 81 is for switching between a television and a VTR (video tape recorder) as a monitor, and when pressed once, it functions as a television, and when pressed again, it functions as a VT monitor. These detailed operations will be explained later using the block diagram shown in FIG. Operation switch section 82
83 is for adjusting the brightness, and when the left operating switch 82 is pressed, the brightness decreases, and if the switch 82 is kept pressed, the brightness gradually decreases. Operation switch section 83
is a spider whose brightness increases when pressed. The operation switch sections 84 and 85 are for adjusting the volume. When the left operation switch section 84 is pressed, the volume decreases, and when the left operation switch section 84 is kept pressed, the volume gradually decreases. The operation switch section 85 is a spider that increases the volume when pressed. The operating switch sections 86 and 87 are for channel selection, and when the left operating switch section 86 is pressed, the channel selected by the tuner section is lowered, and as the button is kept pressed, the channel is gradually lowered. When the operation switch section 87 is pressed, the number of channels to be selected increases.

The above-mentioned operation switch section 8 is located on the right side of the LCD TV main body.
Adjustment parts that are used less frequently than those in Nos. 1, 82, 83, 84, 85, 86, and 87 are provided. For these, volume-type or change-over type mechanical switches are used. The knob 11 is for adjusting the color density, and by rotating this knob 11 up and down, the S lightness of the color can be adjusted. The knob 12 is for adjusting the hue, and by rotating the knob 12 upward, the hue can be adjusted.

The knob 13 is a power switch. This knob 13 has four functions and can be switched in three stages. By sliding this knob up and down, the power can be switched to an on state, an off state, and a charging state.

Although not shown, a slide switch for switching between νH and UHF bands is provided on the top of the LCD TV.Also, as a single output terminal, there is a slide switch on the top of the LCD TV. The external antenna terminal is also
On the left side of the LCD TV.

A video input terminal, an earphone terminal, and an external power terminal are provided. In addition, on the top of the LCD TV body,
An extendable Rondo type antenna is attached, but is not shown here.

FIG. 2 is a front view of a partial cross section of the liquid crystal panel 5. The liquid crystal panel 5 normally includes an image display section 5a that displays an image with a liquid crystal sandwiched between glass or the like having transparent electrodes, and an image display section 5a that displays an image. Horizontal scanning section 7a-1, 7a-2゜7a-3, 7a
-4 and a peripheral section 5b in which vertical scanning sections 7b-1, 7b-2, and 7b-3 are arranged. Peripheral part 5b
The portion is covered with a metal shield plate 6 to prevent the scanning signal from being disturbed by external noise or the like. Therefore, the external appearance of the liquid crystal panel 5 is such that a portion of the shield plate 6 is cut out, and only the image display section 5a of the liquid crystal panel is exposed from the center thereof.

The horizontal scanning units 7a-1 and 7a-2 control the pixels in odd-numbered columns, and the horizontal scanning units 7a-3 and 7a-4 control the pixels in even-numbered columns. The horizontal scanning sections of the odd-numbered columns and even-numbered columns are each divided into two parts. In the example of a 5-inch diagonal liquid crystal panel, the number of horizontal scans is 480.

The vertical scanning sections 7b-1, 7b-2, and 7b-3 are composed of three parts, and in the example of a liquid crystal panel with a diagonal of 5 inches.

The number of scans in the vertical direction is 240.

Here, the horizontal scanning section is divided into two parts in the upper part, but it may not be divided into one part, but may be provided only in the part part of the image display part 5a of the liquid crystal panel 5. In that case, the position of the peripheral part 5b is as follows. It is not U-shaped as shown in Figure 2, but L-shaped. Further, the vertical scanning section may be divided into left and right halves.

FIG. 3 is a front view of the liquid crystal television main body, in which the liquid crystal panel 5 disposed in the inner part of the top case 2 is indicated by a broken line. That is, the image display section 5a is visible through the transparent front &2b, and the image is displayed here.Furthermore, above the peripheral section 5b of the liquid crystal panel, there are key switch type operation switch sections 81, 82, 83,84°85.86.87
An operating section 8 having a function is arranged.

FIG. 4 shows a side sectional view of the liquid crystal television main body. The liquid crystal panel 5 is installed between the top case 2 and the center case 3, and the operation parts 8 such as the operation switch parts 81 and 82 are attached to the peripheral part 5b of the top case 2 and the liquid crystal panel 5 at the peripheral part 5b below the liquid crystal panel. It is installed between the covering shield case 6, and protrusions 8b such as operation switch parts 81 and 82 protrude from the top case 2.

The projection 8b is pressed from the front.

Furthermore, circuit boards 9a and 9b and a backlight 10 are attached between the center case 3 and the bottom case 4.

The backlight 10 is located on the front side of the liquid crystal panel 5.
A diffuser plate 14 is disposed at a portion that contacts the image display section 5a, and uniformizes the light from the backlight 10 and the subsequent reflecting plate 15. Here, the backlight 10 is a single straight tube type, but it may be a U-shaped tube or two straight tubes.

The circuit board consists of a main board 9a and a sub board 9b.
Both are connected by a boss 24 containing a lead reel. On the sub-board 9b is a liquid crystal panel 5 as described later.
A control unit is provided. The vertical and horizontal scanning circuits of the liquid crystal panel 5 are connected to the connector 18.
8 and the connector 23 on the sub-board 9b are connected by a flexible board 18.

Further, the operating parts 8 such as the operating switch parts 81 and 82 and the connector 25 on the main board 9a are also connected by the flexible board 19.

Top case 2 and center case 3 are fixed with screws 20. By tightening with screws 20, liquid crystal panel 5 is fixed between top case 2 and center case 3. The main board 9a.

It is fixed to the bottom case 4 by screws 22 and 26. Bottom case 4 is fixed to center case 3 with screws 21. Backlight 10, diffuser plate 141 reflector plate 1
5 is fixed within the body and then fixed to the center case 3.

The bottom case 4 has a stand 16°1 that can be folded in two.
7 is attached, and when in use, it is folded as shown in the figure, and the inclination angle can be adjusted in three stages. The number of adjustment angles may be greater.

When not in use, the stands 16 and 17 are held in a straight line and in close contact with the bottom case 4.

Here, since the operating section 8 is provided at a lower front position of the LCD TV, when the protrusion 8b of the operating section 8 is pressed with a finger as shown in FIG. 4, force is exerted by the finger. Since the stand 16°17 is positioned in the direction, the LCD television body has the advantage of being stable and easy to operate.

This operating section may be placed at any position in the peripheral portion 5b, so it may be placed to the left or above the single-image display section 5a in FIG.

If the type is mounted on a wall or the like rather than the type that is held on a desk using a stand, depending on the positional relationship between the operator and the LCD TV, it may be easier to operate from the top or left side of the image display section 5a. You can also choose the placement from a design perspective.

FIG. 5 is an exploded sectional view showing the manufacturing process of a liquid crystal television. First, the operating section 8 is aligned and fitted into the lower stepped section 27 of the top case 2, so that the protruding section 8b of the operating section 8 protrudes from the hole in the top case 2. Next, the liquid crystal panel 5 is attached to the upper protrusion 28 of this top case 2.
Fit the recess (not shown) to align the position of the liquid crystal panel 5. On this.

The positioning of both parts 6 to which the center case 3 is attached is performed by the stepped part 29 on the outer periphery of the center case 3 and the outer periphery 30 of the top case 2. Thereafter, the top case 2 and the center case 3 are fixed with screws 20.

There are two screws 20 on the top and two on the bottom, but the lower one is omitted in the figure, and the upper one is in the shadow of the screw 20. Thereafter, the backlight 10, the diffuser plate 14, and the reflector plate 15 are fixed to the center case 3 after being fixed as one body.

The fixing method is to press it against the center case 3 with a plate. On the other hand, the bottom case 4 is assembled separately as follows. That is, the main board 9 is installed in the bottom case 4.
a is fixed by screws 22 and 26.

A connector 31 is fixed on the main board 9a. The lead wires built into this connector 31 and exposed from both ends are inserted into the post 24.

Connector 31 is fixed. The lead wire exposed from the other end of this connector 31 is inserted into the hole of sub base 9b,
be soldered. The ICs and the like on the sub-board 9b are connected to the lead wires by printed wiring formed on the sub-board 9b. After assembling as described above, the plexiple wiring 18.19 is connected to the connector 23.25, and the top case 2, center case 3 assembly, and bottom case 4 are assembled.
is fixed with screws 21.

As mentioned above, the top case, operation section, liquid crystal panel, and center case are installed, the top case and center case are fixed, and the backlight unit consisting of the light and the diffuser plate 2 is fixed to this center case. Furthermore, since the bottom case with the circuit board fixed inside it is fixed, manufacturing and assembly becomes smoother.
Easy to assemble.

Note that the backlight unit may be attached to the bottom case 4 side.

FIG. 6 is a block diagram of a liquid crystal television according to an embodiment of the present invention. The LCD television 100 receives broadcast waves from an antenna 4.
0 to the tuner 41, and the video and audio signals of the channel (frequency) selected by the channel selection circuit 48 are output. This signal is sent to the video and audio intermediate frequency amplification circuit 42, where the video signal and audio 4'? is separated into issues.

Here, the signal from the video and audio intermediate frequency amplification circuit 42 and the signal from the external video equipment are the signals from the manual switching circuit 43.
You can select and output. The audio signal is sent to the lt amount control circuit 44.
, is output to the speaker 46 via the audio output circuit 45.

Further, the audio signal is also guided to the earphone terminal 47, and can be listened to through the earphone. Further, the video signal is demodulated into a primary color signal by a video/chroma circuit 50, and γ-corrected by a signal shaping circuit 52. Furthermore, the inverting amplifier circuit 53 extracts the polarity inverted signal, and the plexiple wiring Ht
The vertical and horizontal scanning circuits of the liquid crystal panel 5 are manually powered via a. The screen display circuit 51 adjusts the brightness of colors and outputs a control signal to the video/chroma circuit 50.

On the other hand, the video signal input to the synchronization separation circuit 54 is converted into horizontal and vertical synchronization signals, and the output signal δ of the control IC 2, which is input to the control IC 55, is transmitted via the plexiple distribution [18]. The signal is input to the scanning circuit of the liquid crystal panel 5, and controls the timing of vertical and horizontal operations.

Here, the inverting amplifier circuit 53 and the control IC 55
is provided on the sub-board 9b, and the circuits outside the bare side are provided on the main board 9a.

Note that the power supply circuit 56 is supplied with direct current voltage from a direct current power source 57 such as an AC adapter or a DC power source, and a battery 58, and a controlled output voltage is supplied to each circuit.

Further, a microcomputer 49 is used for controlling the operation unit 8 such as channel selection, volume one-screen display, and TV/video switching.

The operation unit 8 includes a group of control switches 81 for channel selection, volume, etc.
, 82, 83, 84, 85, 86.87, and the contact points of these switch groups are A, B, C, and D in Figure 6.
, IE, F, etc., and the functions of these switches are determined by key matrix signals from the microcomputer 49. That is, a scanning signal is sequentially sent from the microcomputer 49 via the diode, and when a predetermined contact point of the switch group is pressed, this scanning signal is read into the microcomputer 49.
Which contact point is being pressed is determined based on information about which line was read from and at what timing. Therefore, the operating section 8 does not require any circuit components other than the key switch, and can be configured to be thin.

Depending on the type of switch pressed, the microcomputer 49 sends control signals to the channel selection circuit 48, the manual switching circuit 43, and the screen display circuit 51 to perform the control desired by the operator.

The key switch referred to here is not something that can hold a physical state of two or more values by itself, but the contact is closed only while it is pressed, and the state is identified by the read signal from the key matrix circuit. say. By using such a key switch, the operating section can be made thin and can be placed in the space between the top case 2 and the liquid crystal panel 5.

As for the type of key switch, a key top, which is a protrusion, is used, but a sheet-shaped key switch used in things such as card-type calculators may also be used. Also, there is no contact point and 8
It may be possible to obtain a binary state by changing the amount.

Also, if there is some space between the top case 2 and the liquid crystal panel 5, select the switch type.

It is not a key switch, but the contact closes when pressed - degrees.

A switch may be used in which the contact point opens when the switch is held in that state and pressed again. Even in this case, the LCD television main body can be made more compact.

The number of key switches is not limited to seven as in this embodiment, but can be increased or decreased. If space permits, other switches may be placed in front of the switch.It is easier to press the switch if the width of the switch is slightly larger than the width of one finger.In this case, even if the distance between adjacent switches is short, the switch This prevents you from pressing the wrong button when pressing the button. The number of switches arranged horizontally is the width of the LCD TV itself.

It is determined by the width of the switch and the distance between adjacent switches, so if you want to place more than that in front, you can place them in the upper 82 rows, or divide them into the bottom and top of the image display area. good.

According to the present invention, the front external size of a liquid crystal television can be made approximately the size of a liquid crystal panel, and even a liquid crystal television with a large screen can be made compact.

Furthermore, since the operation section is thin and can be placed in the gap between the top case and the shield case, the thickness of the liquid crystal television does not increase.

Furthermore, since the operating section is on the same plane as the screen, it is easy to see and press, resulting in stable operation.

[Effect of the Invention J] According to the present invention, the front external size of a liquid crystal television can be made almost the size of a liquid crystal panel, and even a liquid crystal television with a large screen can be made compact.

Furthermore, the ease of assembling the liquid crystal television can be improved.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing an embodiment of the present invention. FIG. 2 is a sectional view showing the structure of a liquid crystal panel according to an embodiment of the present invention, FIG. 3 is an external front view showing the stored state of the liquid crystal panel according to an embodiment of the present invention, and FIG. FIG. 3 is a cross-sectional view showing the operation status of an embodiment of the present invention. FIG. 5 is an exploded side sectional view of one embodiment of the present invention, and FIG. 6 is a block diagram of one embodiment of the present invention. Qi 1 Shaku 1...LCD TV, 2...Top case, 2b...
・Front plate, 3... Center case, 4... Bottom case, 5... Liquid crystal panel, 5a... Screen display section, 5
b... Peripheral part, 6... Shield case, 7a...
Horizontal scanning circuit section. 7b... Vertical scanning circuit section, 8... Operation section, 8b...
・Knob, 9...Circuit board, 10...Backlight. No.? Closed 7α-1'/a, -2! / / J-3 oL-4 Figure 4 Figure 4? -zb (/ / Ward (spontaneous) Display of the case 1988 Patent Application No. 289980 LCD TV and its manufacturing method Amendment case Related to the case Patent applicant (Detailed description of the invention in the specification of 5101 Co., Ltd.) 2. Correct “TV case” in line 6 of page 6 of the same page to “top case”. 3. Lines 4 to 5 of page 8 of the same page. [The channel is decreasing and gradually decreasing] is corrected to ``Channel i is decreasing and if you continue to press it, it will gradually decrease.'' 4, page 8 of the same page. 5. Correct "by fraud" in line 8 of page 9 of the same to "prevent" from "r channel number" written in line 7. 6. Page 16 of the same. "Screen display circuit......control signal" described in line 20 to line 1 of page 7
"The screen display circuit 51 is for displaying characters, symbols, etc. on one screen, and displays characters, symbols, etc. from the microcomputer 49.
Corrected to ``symbol display control signal''. 7. On page 17, line 9 of the same document, ``outside the base side'' is corrected to ``other than that''. that's all

Claims (1)

[Scope of Claims] 1. A liquid crystal television using a liquid crystal panel having an image display section that displays images using liquid crystal, and a peripheral section in which a scanning circuit section that drives the liquid crystal of this image display section is arranged, A liquid crystal television, characterized in that an operation section including a switch is arranged on the front surface of the peripheral part of the liquid crystal panel. 2. The liquid crystal television set according to claim 1, wherein the switch of the operating section is a thin key switch. 3. The liquid crystal television set according to claim 2, wherein the key switches constitute a matrix, and the pressed key is determined based on a key matrix signal from the control section. 4. The liquid crystal television set according to claim 1, wherein the operation section is provided at a lower front position of the liquid crystal television, and a stand for holding the main body is provided on the back side of the liquid crystal television body. 5. In claim 1, the peripheral portion of the liquid crystal panel is provided at at least two locations, at least one of the right and left sides of the image display section and at least one of the top and bottom of the image display section. Characteristic LCD TV. 6. In claim 1, the switch in the operating section is:
A liquid crystal television set characterized by a switch for channel selection. 7. In claim 1, the switch in the operating section is:
An LCD television characterized by a switch for adjusting screen brightness. 8. In claim 1, the switch in the operating section is:
An LCD television characterized by a switch for adjusting volume. 9. In claim 1, the switch in the operating section is:
A liquid crystal television set characterized by a switch for switching between functions as a television and a VTR monitor. 10. After holding the operation unit between the top case and the LCD panel, attach the center case on top of this, fix the top case and center case, and then place the bottom case with the circuit board fixed inside it as above. A method for manufacturing a liquid crystal television, characterized in that it is fixed to either a top case or a center case. 11. The method of manufacturing a liquid crystal television according to claim 10, further comprising fixing a backlight unit comprising a backlight, a diffusion plate, and a reflector to the center case. 12. The method of manufacturing a liquid crystal television according to claim 10, wherein the operation section is positioned by a stepped section provided on the top case. 13. The method of manufacturing a liquid crystal television according to claim 10, wherein the liquid crystal panel is positioned by a protrusion provided on the top case. 14. The method of manufacturing a liquid crystal television according to claim 10, wherein the top case is positioned by a stepped portion provided on the outer periphery of the center case. 15. The method of manufacturing a liquid crystal television according to claim 10, wherein the top case and the center case are fixed to hold the operation section and the liquid crystal panel between the two cases.